Creasing mechanism



A NOVCK;

CREASING MECHANISM.

.j PPLICATION FILED APR. i, 1921.

2 SHEETS-SHEET 2.

ABRAHAM NOVICK, 0F BROOKLYN, NEW YORK, i-'iSSIGNOR TO F. L. SMITEE MCHNE COMPANY, INCORPORATED, OF NEW' YORK. Y., .el CORPORATION OF NEW YORK.

CREASING MECHANIST.

Specification of Letters Patent.

Patented July el, 1922.

T 0 all whom t may concern: y

Be it known that l, ABRAHAM hTovroK, a citizen of the United States, and a resident vof New York, borough of Brooklyn, in the county of Kings and State of New York, lhave invented cert-ain new and useful lmprovements in Creasing Mechanisms, of which theI following is a specification.

This invention relates to creasing mechanisms and has for its object to provide means 0f the class specified whereby there is formed in a sheet of paper or the like a well defined crease without folding the body of the paper into itself.

To these ends my improvements comprise V'features illustrated in their preferred embodiment in the drawings accompanying -this specification, wherein Figure 1 is a plan view of a structure adapted for creasing paper or the like in accordance with my improvements. F ig. 2 is a side elevation corresponding with the showing of Fig. 1. Fig. 8 is an end elevation of the same and Figs. 4, 5, 6 and 7 are fragmentary cross-sectional elevations on lines il, 5, 6 and 7 respectively vin Fig. 2. Figures 1, 2 and 3 are to one scale, and Figures at, 5, 6 and 7 are to another scale about double the size of that of Figs. 1, 2 and 3.

Directing attention particularly to Figs. 1 to 3 inclusive, my improved mechanism comprises, in its elemental features, a pair ofv peripherally coacting rolls on substantially parallel axes, over the faces of which rolls, transverse to their axes, and at approximately right angles to the plane common to said axes, the paper to be creased is fed. Located above the common plane of the faces of said rolls, over w rich the paper is fed, is a wheel or blade having a V shaped edge projecting slightly below said roll-face plane with an appreciable space between said blade and said rolls and adapted for forming in said paper a linear depression prior to the passage of the paper, as it is fed forwardly over the area of roll coaction, whereby a portion of the paper is offset along a line and said offset portion delivered between the co- 'acting peripheries of said rolls, for squeezing together said offset portion, whereby the paper is folded upon itself within a narrow area along and on opposite sides of said line.

For convenience l have illustrated my improvements as directed to forming two parallel creases in a continuous web of paper such as may later be divided into lengths for forming into `open-ended envelopes. To this end my improved mechanism is provided with several features of adjustment to meet the requirements of varying' widths of paper and varying spacing between creases.

As the creasing mechanism per se is shown in right and left duplicate, a description of one unit of mechanism will suiiice for both. Rolls 2, 3 peripherally coacting, are preferably arranged on vertical axes, substantially parallel, and normal to the path of paper 8 as it is led over the upper faces 2a, 3a of said rolls. Roll 2 is fixed to the upper end of sha-ft 9 rotatably mounted in bracket 10 adj ustably fixed to the end of table 11.` Roll 8 is fixed toy the upper end of shaft 12, rotatably mounted in bracket 13, pivot ally attached at 14 to bracket 10, so that said rolls may move rela-tively to each other to provide greater or less space between their peripheries as occasion may require. Said rolls are urged toward each other peripherally by spring 15. The lower end of shaft 9 has fixed thereto gear 16 and sprocket 17, the former meshing with equal gear 18 fixed to the lower end of shaft 12.

Uprights 19 and 2O of table 11 have lixed to their upper ends cross-bar 21 from which depends bracket 22 adjustable lengthwise said bar and crosswise the machine. Said bracket has pivotally attached thereto arm 23, reaching tothe right in Figs. 1 and 2 and carrying on its free end wheel or blade 24;, having a V shaped edge for engaging the paper just prior to its passage over the faces of rolls 2, 3. For convenience arm 23 is held in its opera-tive position by spring plunger 2.5, from engagement with which it may be released by swinging said arm upwardly, when threading paper into the machine. YWhile blade 24 might be in the form of a complete wheel and rotate in action as the paper passes thereunder, l prefer to hold said blade rigid against the end of arm 23 so that the paper drags thereunoer. Also for adjusting said blade toward and from the paper, l preferably make hole 26 therethrough, somewhat larger than stud 2T by which it is held to said arm.

For feeding the paper through the machine the usual draw rolls 28, 29, on shaft 33 coacting with roll 31 on shaft 34, may be employed. Roll 28 may be adjustable lengthwise its shaft to accommodate different widths of paper. Shafts 33, 34 to which said rolls respectively are fixed, have bearings in uprights 35, 36 and upper shaftv33 may be urged downwardly for causing rolls 28, 29 to coact with roll 31 by means ofv springs as 37. Shaft 34 has fixed to its rear end, Figs. 1 and 2, mitre gear 38 meshing with similar gear 39 fixed to vertical shaft 40 turning in bearing 41 of table 11. The lower end of said shaft 40 has sprocket'42 fixed thereto and from said sprocket chain 43 engages sprocket 17 on shaft 9 of roll 2 and similar sprocket 44 of shaft 45, to the upper end of which roll 4G of the other pair of coacting rolls is Ifixed. Then said chain returns under takeup sprocket 47 to sprocket 42. By this means both sets of rolls, as 2, 3, will be driven in the direction of their arrows as shaft 34 is turned in anticlockwise direction, Fig. 2.

Directing attention now more particularly to Figs. 4 to 7 inclusive the operation of my improved mechanism is as follows: When no paper is fed to the machine rolls 2, 3 will be held in peripheral contact by spring 15, or if desired said rolls may be fixed at a predetermined distance apart according to the thickness and hardness of the paper to be creased. However, I prefer to use them spring urged as shown, whereby they accommodate themselves to inequalities of the paper. Blade 24 is located about in the plane of tangency of said rolls and has its lower V edge slightly below the upper faces 2a, 3n of said rolls but not in contact with the rolls. Thus when the paper is fed over said faces a linear depression is formed in said paper, see Fig. 4, and as the paper advances nearer the rolls, Fig. 5, that depression is more abrupt in character and is finally defined as of U or V shaped in cross-section just as it leaves the edge of blade 24 and passes between the upper portions of the peripheries of the rolls, Fig. 6. Then said rolls, Fig. 7, squeeze together said depressed or offset portion, whereby the paper is folded upon itself along the line of the previously formed linear depression. It will be observed that this offset portion of the paper is confined to a narrow area on each side of edge 24Z1 of said blade and that the major portion of the paper widthwise, is substantially unaffected by the operation within this narrow area and that the major portion of the paper is maintained in the general plane of the advancing web or sheet. Then, as the paper leaves the immediate field of creasing, the creased portion is opened out by the general tension on the web as it is advanced by the feed rolls.

YVHowever, the crease has been so thoroughly and definitively formed that in later operations the sheet may be folded along said crease with facility and precision.

I claim:

1. In a creasing mechanism the combination of a pair of peripherally coacting rolls, means for feeding paper or the like over the faces of said rolls transverse their axes, and means for forming in the paper an offset portion along a line and for guiding said portioninto the field of coaction of said rolls, whereby the paper is folded upon itself along said line. v

2. In a creasing mechanism the combination of a pair of peripherally coacting rolls, means for feeding paperor the like over the faces of said rolls transverse their axes, and a blade adapted for forming in the paper an offset portion along a line and for guiding said portion into the field of coaction of said rolls, whereby the paper is folded upon itself along said line.

3. In a creasing mechanism ther combination of a pair of peripherally coacting rolls, means for feeding paper or the like over the faces of said rolls transverse their axes, and means for forming in the paper a narrow offset portion along a line without deflecting the major portion of the paper from its general plane and for guiding said portion into the field of coaction of said rolls, kwhereby the paper is folded upon itself along said line. I Y

4. In a creasing mechanism the combination of a pair of peripherally coacting rolls, means forfeeding paper or the like over the faces of said rolls fransverse their axes, and

a blade having a substantially V shaped edge projecting below the plane of said roll faces adjacent and antecedent to the area of c0- action of said rolls with an appreciable s ace between said blade and said rolls, said b ade being adapted for forming in said paper a linear depression.

5. ln a creasing mechanism the combination of a pair of peripherallycoacting rolls, means for feeding paper or the like over the faces of said rolls adjacent their area of coaction, a blade for forming in said paper a linear depression prior to the passage of the paper over the area of roll coaction, whereby a portion of the paper is offset along a line and said offset portion delivered between the coacting peripheries of said Vrolls for squeezing together said offset portion, whereby the paper is folded upon itself along said line. i

6. ln a creasing mechanism theV combination of a pair of peripherally coacting rolls on substantially parallel axes one of which rolls is spring urged to said coaction, means for feeding paper or the like over the faces of said rolls in a direction normal tothe common plane of their axes, and means comprising a fixed blade, for depressing the pallO per below the plane of the faces of said rolls, substantially midway between said rolls before the paper reaches the point of coaction of said rolls.

7. In a creasing mechanism the combination of a pair of peripherally coacting` rolls on substantially parallel axes one of which rolls is spring urged to said coaction, means for feeding paper or the like over the faces of said rolls in a direction normal to the common plane of their axes, means comprising a fixed blade, for depressing the paper below the plane of the faces of said rolls, substantially midway between said rolls before the paper reaches the point of coaction of said rolls, and means for rotating the rolls at a peripheral speed substantially equal to the speed of the paper.

8. In a creasing mechanism thecombination of two pairs of peripherally coacting rolls on substantially parallel axes lying in one plane, one of which rolls is spring urged to said coaction, means for adjusting one pair of rolls toward and from the other pair, means for feeding paper or the like over the faces of said rolls in a direction normal to the common plane of their axes, and means comprising a fixed blade in front of each pair of rolls for depressing the paper below the plane of the faces of said rolls, said blade being located substantially in the plane of tangency of said rolls.

9. In a. creasing mechanism the combination of two pairs of peripherally coacting rolls on substantially parallel axes lying in one plane, one of which rolls is spring urged to said coaction, means for adjusting one pair of rolls toward and from the other pair, means for feeding paper or the like over the faces of said rolls in a direction normal to the common plane of their aXes, means comprising a fixed blade in front of each pair of rolls for depressing the paper below the plane of the faces of said rolls, said blade being located substantially in the plane of tangency of said rolls, and means for rotating said rolls at a peripheral speed substantially equal to the speed of the paper.

In witness whereof, I hereby affix my signature this day of March, 1921.

ABRAHAM NoVicK. 

